package com.edgar.nio.buffer;

import java.nio.ByteBuffer;

/**
 * @Auther EdgarLQS
 * @Date 2021-01-02 23:23
 */
public class ReadOnlyBuffer {

    public static void main(String[] args) {

        //创建一个buffer
        ByteBuffer buffer = ByteBuffer.allocate(64);
        for(int i = 0; i < 64; i++) {
            buffer.put((byte)i);
        }
        //读取
        buffer.flip();
        //得到一个只读的Buffer
        ByteBuffer readOnlyBuffer = buffer.asReadOnlyBuffer();
        System.out.println(readOnlyBuffer.getClass());
        //读取
        while (readOnlyBuffer.hasRemaining()) {
            System.out.println(readOnlyBuffer.get());
        }
        readOnlyBuffer.put((byte)100); //  因为只读，所以报错 java.nio.ReadOnlyBufferException
    }

}
